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                # 斷言 (assert) ~~~ 穩定度: 5 - 已鎖定 ~~~ 該模塊用于編寫程序的單元測試用例,通過require('assert')調用 ### assert.fail(actual, expected, message, operator) 拋出一個異常,顯示用例的實際值(actual)和期望值(expected),通過分隔符(operator)隔開。 ### assert(value, message), assert.ok(value, [message]) 測試結果是否為真(true),相當于 `assert.equal(true, !!value, message);` ### assert.equal(actual, expected, [message]) 淺測試,等同于使用'=='進行相等判斷 ### assert.notEqual(actual, expected, [message]) 淺測試,等同于使用'!='進行不相等判斷 ### assert.deepEqual(actual, expected, [message]) 深度匹配測試 ### assert.notDeepEqual(actual, expected, [message]) 非深度匹配測試 ### assert.strictEqual(actual, expected, [message]) 嚴格相等匹配測試,等同用'==='判斷匹配 ### assert.notStrictEqual(actual, expected, [message]) 不嚴格相等測試,等同于使用'!=='判斷不匹配 ### assert.throws(block, [error], [message]) 聲明一個block用于拋出錯誤,'error'可以是構造函數,驗證函數或者正則表達式 用構造函數驗證實例 ~~~ assert.throws( function() { throw new Error("Wrong value"); }, Error ); ~~~ 用正則表達式驗證信息錯誤 ~~~ assert.throws( function() { throw new Error("Wrong value"); }, /value/ ); ~~~ 自定義錯誤校驗: ~~~ assert.throws( function() { throw new Error("Wrong value"); }, function(err) { if ( (err instanceof Error) && /value/.test(err) ) { return true; } }, "unexpected error" ); ~~~ ### assert.doesNotThrow(block, [message]) 聲明模塊不拋出錯誤,詳見 assert.throws ### assert.ifError(value) 測試值是否不為 false,當為 true 時拋出。常用于回調中第一個 error 參數的檢查。
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